Spring-adjuster.



B. T. WILLISTON. SPRING ADJUSTER.

APPLICATION FILED MAY 23, 1914.

Patented Mar. 2, 1915.

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THE NORRIS PETERS CO.. PHOTOLITHQ. wAsHlNGmN. D. cl

B. T. WILLISTON.

SPRING ADJUSTER.

APPLIOATION FILED MAY 23, 1914 PatentedMar.2,1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS 60.. PHOTCPLITHOU WASHING roNv D. c.

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BELVIN T. WILLISTON,'OF SOMERVILLE, IVLASSAGHUSETTS, ASSIGNOR TO THE UNITED INJECTOR COMPANY, OF NEW YORK, N. 1 A CORPORATION OF. NEW YORK.

SPRING-ADJUSTER.

Specification of Letters Patent.

Patented Mar. 2, 1915..

Application filed May 23, 1914. Serial No. 840,624.

To all whom it may concern:

Be it known that I, BELVIN T. WILLIs- TON, a citizen of the United States, and resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Spring-Adjusters, of which the following is a specification.

My invention relates to spring adjustments, and is addressed particularly to the adjustment of valve springs.

' The object of my invention is to provide a spring adjuster which shall always bear accurately on the spring, avoid either torsion or lateral displacement of the spring and thus insure accuracy of adjustment of spring pressure, and which shall occupy less space than spring adjusters heretofore in use.

In the drawings hereto annexed which illustrate my invention in that form thereof which I believe to be the best, \Figure 1 is an elevation and part section of a spring adjuster mounted on a valve; Fig. 2 is a side elevation of the spring housing; Fig. 3 is a vertical section of the spring housing on the line 33 of Fig. 2, showing the spring saddle and adjusting nut in dotted lines; Fig. 4 is a plan view of the spring saddle; Fig. 5 is a vertical section of the spring saddle on the line 55, Fig. 4;; Fig. 6 is an end elevation of the spring saddle; Fig. 7 is a plan view of the adjusting nut, partly broken away; and Fig. 8 is a vertical section of the adjusting nut on the line 88, Fig. 7

In Fig. 1 a valve casing is shown at A. The valve within the casing may be any kind of valve which is to be under the control of a spring, such as S, and the casing may therefore be of any type suited to the variety of valve. Upon the valve casing, or secured to it in any suitable manner, there is a spring housing B, which is tubular to accommodate the spring S, externally threaded along the portion B which may be longer or shorter, according to the range of spring adjustment to be provided for; the spring housing B may have a flanged base, as B, for the accommodation of holding bolts B The spring housing B is slotted at opposite sides at B and at the upper ends of the slots B there is a saddle-way B wider than the slots, transversely across the spring housing. The valve spring S is inserted in the tubular housing B through the open top thereof, so as to bear or exert its influence upon the valve, of whatever nature, in the valve casing A. A saddle C (shown in detail in Figs. 4, 5 and 6) is then inserted laterally through the slots B and saddle way B By comparison of Figs. 2 and 6, it will be seen that the crown C of the saddle C matches the saddle way B in sectional area, while the laterally and (preferably also) downwardly projecting wings C likewise match the slots B* in horizontal dimension. These wings G are formed with side bearings and step bearings C and the relative proportions of the spring housing B and saddle C are such that the side-bearings C when the saddle C is inserted and centered in the spring housing, are about flush with the tops of the threads on the threaded section B of the spring housing, and the steps 0 project beyond the tops 0? said threads, in position to be engaged by the lower rim of the adjusting nut D. The spring S will be temporarily compressed (if need be) to permit the insertion of the saddle G into the saddle way B and slots B. On assembling the parts, the saddle C may be first inserted and the spring S then placed in the spring housing B from below before the housing is attached to the valve casing.

The adjusting nut D is internally threaded to match the threads on the section B of the spring housing B, and may have radially projecting handles D. The lower end of the nut D is bored out to form the saddle-centering surface D and the lower rim D is adapted to bear on the steps C of the saddle-wings C The saddle C being in place (Figs. 1 and 3) the nut D is screwed down on the section B of the spring housing B. The saddle-centering surface D slips into a fairly close fit with the side bearings C on the saddle wings C and the rim D comes to a bearing on the steps C Since the steps C on the saddle-wings C are accurately machined and symmetrical with respect to the crown C, on the under side of which the spring S finds its bearing, being centered by the inner boss C the effort exerted on the spring by the adjusting nut D is symmetrical with respect to the spring. The preferred form here shown, in which the saddle-wings extend downwardly as well as laterally, still further insures an always accurately centered resul ant of effort upon the spring S,'because with the bearing surfaces of the steps and nut-rim I) below the point of application of effort on the spring S, the effort on the spring is always an even pull, which holds the saddle C accurately at right 7 angles to the axis of the spring helix, while the centering efl'ort of the surface D on the side bearings G insures :a constantly central position of the saddle C. Moreover, the engagement of the sides of the slots 13* with the wings G prevents the saddle C from turning and thus torsionally distorting'the spring S. As the diameter of the crown C of the saddle C is nearly equalto the inside diameter of the tubular housing B, the crown C finds proper accommoda scribed spring adjuster is compact in dimensions and operates wholly within the vertical dimension of the spring'housing, requiring no cap or extension above or-beyond the spring housing itself.

WVhat I claim and desire to secure by Letters Patent is; V

1. The combination, with a spring and a device responsive to the pressure of the spring, of a spring-adjuster comprising a' threaded tubular housing for the spring, slotted at opposite sides, a saddle adapted to be mounted on the spring within the housing, said saddle provided with laterally projecting wings extending through the slots in the housing, and an adjusting nut threaded on the housing and bearing on the laterally projecting wings of the saddle, said nut capable of turning in either direction while bearing on the saddle to adjust the position of the saddle.

2. The combination, with a spring and a device responsive to the pressure of the spring, of a spring-adjuster comprising a threaded tubular housing for the spring,

slotted at opposite sides, a saddle adapted to be mounted on the spring within the housing, said saddle provided with laterally projecting wings extending through the slots in the housing, said wings having steps for an'adjusting nut, and an adjusting nut threaded on the housing and bearing on the said steps, said nut capable of turning in either direction while bearing on the saddle to adjust the position of the saddle. I

3. In a spring adjuster, the combination oi 'a threaded tubularspring housing, slotted at opposite sides, a saddle adapted to be mounted on a spring within the housing,

said saddle provided with laterally and downwardly projecting wings extending through the slots in the housing, said wings having steps for'an adjusting 'nut, and the adjusting nut, threaded on the housing and bearing on the said steps.

4. Ina spring ad uster, the" combination of a threaded tubular spring housing, slotted at opposite sides, a saddle adapted to be mounted on a spring within the housing, said saddle provided with laterally and downwardly projecting wings extending through the slots in the housing, said wings having steps and side-bearings for an-adjusting nut, and the adjusting nut, threaded on the housing and bearing on the said steps and side-bearings.

r 5. In a spring adjuster, the combination of'a threaded tubular springhousing, slotted at opposite sides, and provided with a saddle-way at the upper ends'of-and wider than said slots, a saddle provided with a crown adapted to enter said saddle-way laterally and to be mounted on a spring within the housing, said saddle provided with laterally projecting wings extending through said slots in the housing, said wings having steps for an adjusting nut, and the adjust-' ing nut, threaded on the housingand bearing on the said steps.

6. In a spring adjuster, the combination of a threaded tubularspring'housing, Slot-1 ted at opposite sides, and provided with a saddle-way at the upper ends of and wider than said slots, a saddleprovided with a crown adapted to enter-said saddle-way laterally and to be v mounted on a spring within the housing, said saddle provided with laterally projecting wings extending through said slots in the housing, said wings having steps and side-bearings for an adjusting nut, and the adjusting nut, threaded on the housing and bearing on the said steps and side-bearings; a Y

7 In a spring adjuster, the combinationof a threadedtubularspring housing, slotof a threaded tubular spring housing, slotted at opposite sides, and provided with a saddle-way at the upper ends of and Wider than said slots, a saddle provided with a crown adapted to enter said saddle-way laterally and to be mounted on a spring within the housing, said saddle provided with laterally and downwardly projecting Wings extending through said slots in the housing, said wings having steps and side-bearings for an adjusting nut, and the adjusting nut, threaded on the housing and bearing on the said steps and side-bearings.

Signed by me at Boston, Massachusetts, this 21st day of May 1914.

BELVIN T. WILLISTON.

Witnesses:

ODIN ROBERTS, FLORENCE A. CoLLlNs,

Copies, of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

